Wear-resistance of Die Steel with Non-smooth Surface Used to Pressure Casting Die Processed by Laser

摘要

Various non-smooth surfaces that are similar to the surfaces of animal biont are processed on the die steel by laser to improve the wear-resistance and life-span of die. The wear-resistance of various specimens was measured. The results show that the wear-resistance of specimens with non-smooth surfaces are better than that of the smooth specimen. The wear-resistance of specimen whole processed by laser is between the specimen in 2mm distance and 3mm distance. The shape and distributing distance of non-smooth unit affect the wear-resistance of non-smooth specimens because they affect the area ratio and the hardness of non-smooth unit. The non-smooth unit with higher hardness can underprop load, prevent abrasive particles from penetrating into the matrix material and block the wear progress during wear process. Thus the wear-resistance is improved.